From 35309337aacac2eac7d7215e526bddcf7647b8cf Mon Sep 17 00:00:00 2001
From: Thomas Vanbesien <tvanbesi@proton.me>
Date: Wed, 11 Mar 2026 11:02:24 +0100
Subject: Initial project setup: Qt 6.10.2 TCP client library for Alchemie XPL2
 protocol

- Static library (src/) with QML singleton Xpl2Client for TCP communication
- Qt Quick demo app (demo/) with connection UI, command input, and response log
---
 src/Xpl2Client.cpp | 86 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 src/Xpl2Client.cpp

(limited to 'src/Xpl2Client.cpp')

diff --git a/src/Xpl2Client.cpp b/src/Xpl2Client.cpp
new file mode 100644
index 0000000..db53792
--- /dev/null
+++ b/src/Xpl2Client.cpp
@@ -0,0 +1,86 @@
+/**
+ * @file   Xpl2Client.cpp
+ * @brief  TCP client for the Alchemie XPL2 printhead protocol.
+ */
+#include "Xpl2Client.h"
+
+Xpl2Client::Xpl2Client(QObject *parent) : QObject(parent) {
+  connect(&m_socket, &QTcpSocket::connected, this, &Xpl2Client::onConnected);
+  connect(&m_socket, &QTcpSocket::disconnected, this,
+          &Xpl2Client::onDisconnected);
+  connect(&m_socket, &QTcpSocket::readyRead, this, &Xpl2Client::onReadyRead);
+  connect(&m_socket, &QAbstractSocket::errorOccurred, this,
+          &Xpl2Client::onErrorOccurred);
+}
+
+QString Xpl2Client::host() const { return m_host; }
+
+void Xpl2Client::setHost(const QString &host) {
+  if (m_host == host)
+    return;
+  m_host = host;
+  emit hostChanged();
+}
+
+quint16 Xpl2Client::port() const { return m_port; }
+
+void Xpl2Client::setPort(quint16 port) {
+  if (m_port == port)
+    return;
+  m_port = port;
+  emit portChanged();
+}
+
+bool Xpl2Client::isConnected() const {
+  return m_socket.state() == QAbstractSocket::ConnectedState;
+}
+
+void Xpl2Client::connectToServer() {
+  if (isConnected()) {
+    emit statusMessage(QStringLiteral("Already connected"));
+    return;
+  }
+  emit statusMessage(
+      QStringLiteral("Connecting to %1:%2…").arg(m_host).arg(m_port));
+  m_socket.connectToHost(m_host, m_port);
+}
+
+void Xpl2Client::disconnectFromServer() {
+  if (!isConnected())
+    return;
+  m_socket.disconnectFromHost();
+}
+
+void Xpl2Client::sendCommand(const QString &command) {
+  if (!isConnected()) {
+    emit errorOccurred(QStringLiteral("Not connected"));
+    return;
+  }
+  QByteArray data = command.toUtf8() + '\n';
+  m_socket.write(data);
+  emit statusMessage(QStringLiteral("Sent: %1").arg(command));
+}
+
+void Xpl2Client::onConnected() {
+  emit connectedChanged();
+  emit statusMessage(QStringLiteral("Connected to %1:%2")
+                         .arg(m_socket.peerName())
+                         .arg(m_socket.peerPort()));
+}
+
+void Xpl2Client::onDisconnected() {
+  emit connectedChanged();
+  emit statusMessage(QStringLiteral("Disconnected"));
+}
+
+void Xpl2Client::onReadyRead() {
+  while (m_socket.canReadLine()) {
+    QString line = QString::fromUtf8(m_socket.readLine()).trimmed();
+    emit responseReceived(line);
+  }
+}
+
+void Xpl2Client::onErrorOccurred(QAbstractSocket::SocketError error) {
+  Q_UNUSED(error)
+  emit errorOccurred(m_socket.errorString());
+}
-- 
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